Question

What is crossing over? Write the significance of crossing over.

Answer 1

Crossing over:

1. It is the exchange of genetic material between non-sister chromatids.
2. It occurs at the pachytene stage of prophase I of meiosis.
3. Chiasmata represents the site of crossing over.
4. It is the point at which two homologous non-sister chromatids exchange genetic material.

Significance of crossing over:

1. The exchange of chromosome material results in variation in the offspring.
2. It plays a crucial function in the evolution process.
3. The creation of genetic maps is aided by crossing over frequency.
4. Crossing over is evidence of a chromosome's linear organization of connected genes.